Ma with flour creates recipe (7)
I believe the answer is:
formula
'recipe' is the definition.
(synonyms)
'ma with flour creates' is the wordplay.
'with' means one lot of letters go next to another.
'creates' is an anagram indicator.
'ma' put after 'flour' is 'flourma'.
'flourma' anagrammed gives 'FORMULA'.
(Other definitions for formula that I've seen before include "Set of mathematical symbols or recipe" , "Set form of words or method" , "Symbolic relationship" , "Regular approach" , "Milk substitute for babies" .)